R & D: Room 1713, Bldg 2, Namtai Inno Park, Tangwei community, Fenghuang street, Guangming district, Shenzhen 518132, GD, P.R. China. Manufacturing base: Bldg A3, Zhengfeng industrial zone, No. 608 of Fengtang avenue, Fuhai street, Bao'an district, Shenzhen, 518103 GD, P.R. China